Hits 1-5 within 5 documents
Hits 1-5 within 5 documents
Author(s): Mühlhausen, Aribert; Thyrolf, Monika; Pfeiffer, U.; Wiedemann, Dieter; Schmidt, G.; Kaftan, Burkhard; Schulze, H.; Bonus, Hans; Neise, Ulrich; Hoffmann, J.; Sieber, W..- 1971. 53p.
Author(s): Bonus, Hans.- 1970. 35p.
Author(s): Stiehler, Hans-Jörg.- 1977. 21p.
Editor(s): Zentralinstitut für Jugendforschung (ZIJ).- 1976. 24p.
Author(s): Richter, W.; Schumann, Lothar.- 1972. 45p.